Organic Chemistry I
310/318M
Pre-Health Professionals
Unique numbers:
54410, 54435, 54440,
54445,
and
54655
Prof. Jonathan L. Sessler
Lecture 6
Notes:
1st homework due at the start of class today.
2nd homework (on Blackboard) due in one week!
Wel 2.308 -- New room for Monday 11 am recitation
TIPS tutoring every Monday 7-9 pm

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Atomic Orbitals of Hydrogen Review
1s and 2s orbitals
• Used as model for all atoms
• Atomic orbitals have characteristic shapes
• In an artist’s rendition of an atomic orbital, a surface is drawn which contains
most of the probability (e.g., ~90%) of finding the electron at a given time
.
•Nodes
in the orbitals (3-dimensional wave) are points or planes of
zero
probability
of finding the electron.
•The simplest atomic orbitals are spherical in shape and are called s orbitals.
The lowest energy s orbital is the 1s orbital (left, A & B).
The next highest in
energy is the 2s orbital (right, A & B).